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(No Model! 2 sheets sheet l P. H. DE'RNBLL & P. H. BREHMER.

DETAGHABLE PEDAL FOR MUSICAL INSTRUMENTS.

Patented Sept. 7,1897.

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P. H. DERNELL & P. H. BREHMER. DETAOHABLE PEDAL FOR MUSICAL INSTRUMENTS.

No. 589,644. Patented Sept, 7,1897.

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UNITED STATES FRANK II. DERNELL AND PHILLIP ll.

PATENT nines.

"REIIMER, OF RUTLAND, VERMON";

SAID BREI'IMER ASSIGNOR TO IJIIQIJIAN E. BRENNER, OF SAME PLACE.

DETACHABLE PEDAL FOR MUSICAL ENSTRUMENTS.

SPECIFICATION forming part of Letters Patent No. 589,644, datedSeptember '7, 1897'.

Application filed March 30, 1897. Serial No. 629,914. (No model.)

To all whom, it may concern:

Be it known that we, FRANK I1. DERNELL and PHILLIP 1'1. BREHMER, ofRut-land, in the county of Rutland and State of Vermont, have invented anew and useful Improvement in Detachable Pedals for Musical Instruments,of which the following is a full, clear, and exact description.

The object of our invention is to provide an organ-pedal attachment forpianos, which. will enable a person to secure church-organ practice athome.

A further object of the invention is to so construct the organ-pedalattachment to pianos that the attachment may be disconnected from apiano in an expeditious and convenient manner and the attachment foldedtogether so as to occupy buta minimum of space.

Another'object of the invention is to provide an attachment of thecharacter above set forth which may be quickly and readily attached tothe piano, the attachment being so made as not to-detract in the leastfrom the appearance of the instrument, and whereby, further, thedetachable pedals may be constructed in a simple, durable, and economicmanner.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a partial end view of an upright piano, thekey-board beingin section, and also a Vertical section through the pedal attachment,the section being taken substantially on the line 1 1 of Fig. 2. Fig. 2is a section through the attachment, taken substantially on the line 2 2of Fig. 1.. Fig. 3 is a section on the line 3 3 of Fig. 1. Fig. 4- is adetail View of a keeper adapted for attachment to the piano and to beengaged by a lock on the pedal attachment; and Fig. 5 is a sectionthrough the attachment, taken practically on the line 1 1 of Fig. 2,showing the said attachment folded.

The letter A represents the lzey supporting board of an upright piano;B, one of the keys,

which is fulcrunied upon the board in the usual manner; and (1represents keepers which are secured in an upright piano to the bottom,extending up at the front, and the said keepers are preferably made intwo sections 0 and r, as shown in Fig. 4, the section 0' beingadjustable upon the section and the upper section 0 of each keeper isprovided with a suitable opening to receive the latch, to be hereinafterdescribed.

I11 the construction of the organpedal at tachment two frames 1) and Eare employed, one being hinged to the other. The lower frame D is thebase-frame and the upper frame E the action-frame. The lower frame D issubstantially rectangular in cross-section, and consists of side pieces10, front crossbars 11, and rear cross-bars 12, the front and rearcross-bars each being spaced a predetermined distance apart. The pedals13 are pivoted between the two front crossbars 11 by means of pivot-pins14, as shown in Fig. 1, and are held normally in a horizontal positionby means of springs 15. The rear ends of the pedals extend between therear cross-bars 12 of the base-frame, and beneath the rear end of eachpedal 13 a lever 16 is located, the levers being centrally fulcrumed, asshown in Figs. 1 and 5. The levers extend beyond the rear ends of thepedals, and their forward ends are normally held in engagement with thepedals by means of springs 17, attached to the pedals and engaging withthe under faces of the levers at or near their forward ends, as is alsoshownin Figs. 1 and 5.

The action-frame E consists, usually of side pieces 18 and cross-bars19, connecting the side pieces, the lower cross-bar or that which is tobe at the rear of the base-frame having a hinged connection with saidbaseframe at a point preferably over the rear cross-bars 12, and thehinges of the action frame are usually attached to extensions 20 fromthe rear portion of the base-frame, as shown in Fig. 5.

The cross-bars 19 of the action-frame are provided with apertures oropenings suitably alined, the apertures in the upper cross-bar being inalinement with apertures in the lower bar or the bar near the hingedportion of the action -frame. Tracker-rods 21 are IOO passed looselythrough alining apertures in the action-lrai'ne,their end movement beinglimited in any desired manneras, for example, by passing pins throughthe trackerrods above the lower cross-bar and below the upper cross-bar19 of the action-frame. Each tracker-rod 21 consists, preferably, of along section a and a short cap-section a, adjustably connected with thebody -section a through the medium of a screw 22, whereby thetracker-rods may be lengthened or shortened according to the height ofthe keyboard of the instrument, in connection with which they are to beemployed.

Levers 23 are fulcrumed beneath the keysupporting board A, the leverscorresponding in number and arrangement to the number and arrangement ofthe tracker rods 21. Each lever 23 is connected by a rod Bl with a key13 of the instrument, the said connecting-rods 2t passing throughopenings 25 made in the key-supporting board A of the instru ment. Therear ends of the levers 93 carried by the instrument are held in adownwardly-inclined position by means of springs 26, so that the keys llof said instrument are normally in their usual position. At the rear endof each lever 23 a butter-block 27 is preterably secured, as isparticularly shown in Fig. 1, and these butter-blocks are adapted toengage with the cap-sections a of the tracker-rods 21. A link 28 ispivotally attached to the under or hinged portion of the action-frame ateach side, and each of the links 28 is pivotally connected with anangle-lever 29, the angle-levers being adapted to enter the openings inthe upper or adjustable sections of the keepers C, as shown in Figs. 1and 2.

\V hen the attachment is not in use, the action-frame is folded downupon the basetrame, as shown in Fig. 5. hen the attachment is to bebrought into requisition, the base-frame is carried beneath thekeysupporting board A and brought to such a position that the locklevers or latches 29 may engage with the keepers O. The actionframe isthen carried to a vertical position, whereupon the latches or levers 29will be automatically carried upward to an engagement with the keepers0, locking the attachment to the instrument, while at the same time thecap-sections a of the tracker-rods 21 will be brought in engagement withthe butfer-blocks 27 on the levers 23, carried by the instrument. It istherefore obvious that when a pedal is pressed downward by the foot thelever 23, corresponding to that pedal, will be forced upward against thespring 26 and the key connected with that lever will be drawn downward,producing the same action as though the key were struck by a finger, andthe moment that the pedal is released from the pressure of the foot thekey.is restored to its normal position.

The act of dropping the action-frame upon the base-frame disconnects thelatches or le vcrs 29 from the keepers, and the attachment may then beremoved from the instrument and placed wherever desired, the onlyaddition to the instrument then remaining being the levers 23, connectedwith the keys.

Through the medium of an attachment such as has been described pedal orchurch-organ practice may he brought within the reach of any personpossessing a piano, and the attachment will not mar the instrument andwhen not needed may be quickly disconnected from said instrument andremoved.

Ilaving thus described our invention, we claim as new and desire tosecure by Letters Patent- 1. An organ-pedal attachment for pianos, and alocking device for detachably con'nect ing said pedal attachment withthe instrument, the said locking device being operated by the movementof the pedal attachment, as and for the purpose set forth.

2. In an organ-pedal attachmenttorpianos, pedals, tracker-bars operatedby the pedals and arranged to be carried parallel with the pedals or atan angle thereto, and a locking device operated by raising and loweringthe tracker-bars, as and for the purpose set forth.

3. In an organ-pedal attaclunent for pianos, a base-frame carryingpedals, an action-frame having a hinged connection with the baseframe,and locking devices operated by the movement of the action-frame, as andfor the purpose specified.

at. In an organ-pedal attachment for pianos, the combination with thebase-frame, pedals carried thereby, and levers operated by the pedals,of an action-frame having a hinged connection with the base-frame,tracker-bars carried by said action-frame and operated by the saidlevers, and locking devices operated by the movement of theaction-frame, as and for the purpose set forth.

5. In an organ-pedal attachment for pianos, a base-frame, anaction-frame havin a hinged connection with the base-frame, pedalscarried by the base-frame tracker-bars operated by the said pedals, andlocking devices operated by the movement of the action-frame, as and forthe purpose set forth.

6. In an organ-pedal attachment for pianos, the combination, with thekey-supporting board of the instrument, its keys, levers connected withsaid keys and keepers attached to the instrument, of a base-frame,pedals carried by the base-frame, an action-frame having a hingedconnection with the baseframe, tracker-bars carried by the actionframe,operated from the said pedals and ar ranged for en gagen'ient with thesaid levers, and locking devices adapted for engagement with thekeepers, as and for the purpose specified.

7 I11 an organ-pedal attachment for pianos, the combination, with thekey-supporting board of the instrument, its keys, levers connected withsaid keys, and keepers attached to the instrument, of a base-frame,pedals IIC seas i4 carried by the baset'rame, an action-frame having ahinged connection with the baseframe, tracker-rods carried by theactionframe, operated from the said pedals and arranged for engagementwith the said levers, means, substantially as shown and described, forincreasing or decreasing the length of the tracker-rods, and lockingdevices carried by the base-frame and operated by the movement of theaction-frame, substantially as described.

S. The combination with a piano having keepers attached thereto, of anorgan-pedal attachment provided with looking devices adapted forengagement with said keepers, the said locking devices beingautomatically operated by the movement of the pedal attachment,substantially as described.

9. The eombin ation With a piano, and keepers attached thereto, of anorgan-pedal attachment comprising a base-frame, pedals carried by thebase-frame, an action-frame having a hinged connection with thebaseframe, tracker-bars carried by the actionframe, said bars beingoperated by the said pedals, and locking devices adapted for engagementwith the keepers, as and for the purpose specified.

10. A pedal attachment, comprisingabaseframe carrying pedals, anaction-frame having a hinged connection with the base-frame, linkspivotally connected with the actionframe, and angle-levers pivotallyconnected with the said links, as and for the purpose set forth.

11. In a pedal attachment, the combination with the base-frame, pedalscarried thereby, and levers operated by the pedals, of an action-framehaving a hinged connection with the base-frame and adapted to be foldedthereon, tracker-bars carried by the action-framc and provided withadjustable cap-sections, the said tracker-bars being operated by thesaid levers, and locking devices, comprising angle-levers connected bylinks with the said action-frame, substantially as shown and described.

FRANK H. DERNELL. PHILLIP H. BREHMER. Witnesses:

G. CLAYTON FLINT, M. B. TAYLOR.

